Assembly, Structures And Properties Of Metal-Organic Frameworks Based On Flexible Aromatic Carboxylic Acid

Metal-organic frameworks (MOFs) based on carboxylate ligands have highly neat and infinite network structures and potential applications in magnetism, luminescence, catalysis, gas storage and separation. In this paper, we choose 5-oxyacetateisophthalic acid (H3L) as ligand to react to metal ions, and solvothermally synthesized 11 MOFs. They are shown as follows:[Mn(HL)(phen)2(H2O)]·7/4H2O (1)[Mn2(HL)2(phen)2(H2O)2]n·nH2O (2)[Mn(HL)(4,4'-bipy)2(H2O)2]n·2nH2O(3)[Mn4(L)2(4,4'-bipy)2(μ3-OH)2(H2O)2]n·nH2O(4)[Mn3(L)2(2,2'-bipy)2]n·2nH2O (5)[Cd3(L)2(2,2'-bipy)2]n·2nH2O (6)[Co4(L)2(bime)(μ3-OH)2]n·nH2O (7)[Co4(L)2(bimb)2(μ3-OH)2]n·3.5nH2O(8)[Ni4(L)2(μ3-OH)2(H2O)4]n·3.85nH2O(9)[Ag2(HL)]n(10)[Ce(HL)2(H2O)4]n(11)These MOFs were characterized by elementary analysis, IR, thermo-gravimetric and single-crystal X-ray diffraction. And luminescence or magnetism properties were studied for some MOFs. It was also investigated how to control the assembly of MOFs with different flexible ligands, moreover, the relation between structure and property was also studied.